I generally find the bias against recruiters here to be a bit narrow minded and short sighted. Yes, they're a pain. Yes, most are idiots misrepresenting themselves from the first second they talk to me.
But I'm all about increasing interactions. Not restricting them based on race, gender, or having a unfortunate job title like "recruiter."
I'd rather let in 500 crappy posts than turn away a single valuable newcomer to HN. Has upvote/downvote truly proven inadequate for moderating this particular thread?